Automatic train-stop.



K. W. CARLGREN.

AUTOMATIC TRAIN STOP.

APPLICATION FILED APR. 21, 1909,

Patented Feb. 15, 1910.

19i huzmeo T': STATES PATENT OFFICE.

KNTLTT W. CARLGREN, 0F SALT LAKE CITY, UTAH.

AUTOMATIC TRAIN-STOP.

To all whom it may concern:

Be it known that I, KNUT \V.-C.-\nLonnN, a citizen of the United States, residing at Salt Lake City, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Automatic Train-Stops, of which the following is a specification.

My invention pertains to means for automatically stopping a train of cars,.in an emergency, by operating the air brake on the train independently of the engineer or other train man.

i The part of the device not on the engine isportable and quickly adjustable in oper- ,ative position, when conditions require its use. -It is especially valuable during-a heavy fo or snow storm, when lights or other sig nals cannot be seen by the engineer, and timely warning cannot be given the engineer of a broken rail, washout, land-slide or other peril to the train.

The accompanying drawings illustrate the invention, Figure 1 being in outline, a vertical side view of part of an engine cab equipped with a portion of the invention and showing another portion on the track beneath {dotted lines indicate different positions of some of the parts. Fig. 2 is a side view of a part of the device. Fig. 3 is a face view of the parts shown in Fig. 2. Fig. 4 is a face view of the brake lever, and Fig. 5 is an edge View of the' trip.

In the drawings the reference character 8 designates an ordinary locomotive cab, having'an air-brake lever 9. i

10 is the track rail onwhich the engine stands.

12 is a base plate secured to the cab in as nearly a vertical line with the brake lever as is convenient. On this base plate a vertically reciprocating rod 14 is mounted, whose upper end has a link connection with a lever 16, fulcrumed at 17, and with its inner end attached to a spring 15, which connects with a chain or cord 19, which cord is connected to a rigid arm 20 on the brake valve handle 9. A tube 22 is provided in which the cord 19 is movable. A spring 24 on the rod 14, holds the rod m'ovably in its lowest position.

A cross bar 26 on the lower end of rod 14 Specification of Letters Patent.

Application filed April 21, 1909.

Patented Feb. 15, 1910.

Serial No. 491,209.

rests upon the top 28 of a T-shaped lever 30, said lever 30 working on a pivot 31 and having its arm 32 extended downwardly sufficiently to strike, in passing, the trip 34 which isrcmovably attached to the track rail 10. The lever 30 lifts the rod 14, whether moved forward or backward. Until purposely released, the brake lever 9 is held inoperative position by its frictional contact with the guide 35, against which it is pressed by the spring 42.

The trip is composed of a body portion 36 extending under the rail 10, and having a flange 38 to engage the inner edge of the bottom of the' rail. "The outer portion 39 of the tripis bent upward and provided with a threaded hole in which a thumb screw 41 binds the device to the rail. Above the screw 41 the outer portion of the trip is extended upwardly and formed suitably for contact with the lever arm 32 as mentioned above.

The operation of the mechanism, thus described is evident without further explanation.

What I claim and desire to secure, is-

1. An automatic train stop comprising an arm attached to the brake controlling lever, a cord connecting said arm with the inner end of a lever 16 fulcrumed on a base plate, a reciprocating spring rod having a link attachment to the outer end of lever 16, a cross bar on'the lower end of said spring rod, a T- shaped lever fulcrumed on a pivot on said base plate and .whose top is in contact with said crossbar, the lower arm of said T shaped lever being extended downward, and a trip adapted to actuate said mechanism as herein set forth.

2.111 an automatic train stop, a lever.

rod, and means to actuate said rod, as herein set forth.

3. In an automatic train stop, a lever guide. a brake controlling lever in said guide, a spring 42 to movably hold said lever in said guide, a short arm on said brake lever,

acord aitachedeto said arm, & izune t0 protestimony whereof-I afiz; my signature tect said cozd, adspring' 15 attached is the in presence of two wiinesses.

lower end 0 sai cord, a lever having (me v T end attached to said spring 15 and its father KNUT CARMCREB" end attached to a vertically reciprocating Witnesses: rod and means t0 actuate said rod, as herein B. "CLEGG I set fomfih. i EVERARB EIEREN, J 1" 

